OS X: no succesfull user login

I'd succesfully installed zimbra under osx 10.4.4. After starting all services are running. Login as admin isn't a problem. I created a few user accounts and tried to login using some of them, but all the same: login succesfull for a few seconds, but then i've been disconnected automatically without any warning. What's the possible mistake in configuring the servers/accounts?

i've tried to connect as a normal-user from another mac running os x 10.4.4 and firefox 1.5 instead of 1.501: the same result - disconnected after 3 seconds.
Another bug: login as admin i can't see anything at the "Monitoring": Data not yet available" and "Status data is not available". Perhaps this can help anyone to solve this for me.

Can you try launching the app with ?debug=3 This will open a pop-up window. It seems at least one Zimlet is not able to load correctly. Maybe between this and tailing the access_log to compare the date/time stamp we can figure out which one.

You could also just search for this timestamp in the access_log (/opt/zimbra/tomcat/logs) and see if anything matches.

Looking for new beta users -> Co-Founder of Acompli. Previously worked at Zimbra (and Yahoo! & VMware) since 2005.